EQUITY - Stock Offerings (Details) - USD ($) $ / shares in Units, $ in Thousands							12 Months Ended
	Jun. 30, 2020	Jun. 29, 2020	Oct. 09, 2019	May 25, 2018	Nov. 09, 2017	Jul. 25, 2017	Jun. 30, 2020		Jun. 30, 2019	Jun. 30, 2018
Subsidiary, Sale of Stock [Line Items]
USAT shares issued as stock consideration							$ 0		$ 0	$ 23,279
Allocation to equity			$ 17,900
Issuance fees			1,100
Reimbursement of third party costs and expenses incurred		$ 4,500					$ 4,500	[1]
Common stock, shares issued (in shares)	635,593
Underwritten Public Offering
Subsidiary, Sale of Stock [Line Items]
Issuance of common stock in relation to public offering (in shares)				6,330,449		9,583,332
Public offering price (in USD per share)				$ 11.00		$ 4.50
Gross proceeds from offering				$ 69,600		$ 43,100
Underwriter Option
Subsidiary, Sale of Stock [Line Items]
Issuance of common stock in relation to public offering (in shares)				897,866		1,249,999
Shares From Existing Shareholders
Subsidiary, Sale of Stock [Line Items]
Issuance of common stock in relation to public offering (in shares)				553,187
Private Placement
Subsidiary, Sale of Stock [Line Items]
Gross proceeds from offering			$ 20,000
Shares sold (in shares)			3,800,000
Sale of stock (in USD per share)			$ 5.25
Cantaloupe
Subsidiary, Sale of Stock [Line Items]
Issuance of common stock as merger consideration (in shares)					3,423,367
USAT shares issued as stock consideration					$ 23,279

[1] Refer to Note 14 regarding the public offering issued during July 2017 and May 2018, the private placement during October 2019, and the issuance of shares as reimbursement to Hudson Executive Capital LP for costs in connection with its proxy solicitation.